Simple Test For Radar Loops

Simple Test For Radar Loops

You should see 4 different coloured images 1, 2, 3, 4, looping.

Try all combinations of buttons, e.g. click Faster several times,
see very fast loops, then click Stop or Step Fwd or Step Back and expect the images to
stop and then move one step at a time. Click Continue to start the loop again.

Known problem: In some browsers, if you click the Step Fwd and Step Back buttons too fast
(faster than about once-per-second) the browser does not always respond.
This is OK - just click them slowly.